diff --git a/dispatcher/backend/docs/openapi_v1.yaml b/dispatcher/backend/docs/openapi_v1.yaml
index f909a6a70..a8f8d9168 100644
--- a/dispatcher/backend/docs/openapi_v1.yaml
+++ b/dispatcher/backend/docs/openapi_v1.yaml
@@ -156,40 +156,6 @@ paths:
                 $ref: '#/components/schemas/InputError'
         401:
           description: Unauthorized
-  /auth/validate/ssh_key:
-    post:
-      tags:
-        - auth
-      summary: verify public key
-      operationId: validateKey
-      description: Checks that provided RSA public key is valid for User
-      requestBody:
-        content:
-          application/json:
-            schema:
-              type: object
-              required:
-                - username
-                - key
-              properties:
-                username:
-                  $ref: '#/components/schemas/Username'
-                key:
-                  type: string
-                  format: base64 encoded RSA public key text
-                  minLength: 1
-                  example: QUFBQUIzTnphQzF5YzJFQUFBQURBUUFCQUFBQkFRRERJUlNhbStHY0tBQW5tMGpGL1ZCMTJydFhDenBGRTFnc1Q5Q25GdzVkWWJQb2NudWdkbDY0UVpxNjVSdGN5T1BJVEJ0Yk1SOUw2ZEowejI2b21mZFhYd2VFcE5JR0N0SmRtNldzWTNrc0JyNHAvREhFRUVzSDkraGR3RVovQzd3YXlpbDZ3dUlwY3BMNXJLZ2xIRnlZVVJsNDQ5Nis0c0RjMG1YbllGdmVSMkdHRmNsdmwvcTdEejNla1RaNXV4THBhRFl4Y3NrZm5LVm1PQW82b04yYzRhbmtkZ2ozRkxmemRQeHFlakovUmRXVFF4dEtGQmt5VEZ0Wmt2SW9Ub2NXRENISWw0K1k1RExOYzlFTm1TZnlDbFdsYVRxaVlBZm4rY3QvZXNrZHFxK0dHY0pkVnAwREFSWUdMb3NNV3JQbm01WWdRL3EwOHEzcmNIZ1NzOG1I
-      responses:
-        204:
-          description: Public key is valid for User
-        400:
-          description: Bad Request (invalid input)
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/InputError'
-        401:
-          description: Unauthorized
 
   /schedules/:
     get:
@@ -1406,7 +1372,6 @@ paths:
                     - added
                     - fingerprint
                     - key
-                    - last_used
                     - name
                     - pkcs8_key
                     - type
@@ -1421,10 +1386,6 @@ paths:
                     key:
                       type: string
                       example: AAAAB3NzaC1yc2EAAAADAQABAAABAQDDIRSam+GcKAAnm0jF\/VB12rtXCzpFE1gsT9CnFw5dYbP
-                    last_used:
-                      type: string
-                      format: date-time
-                      example: "2019-08-12T08:22:10.519000Z"
                     name:
                       type: string
                       example: my-key
diff --git a/dispatcher/backend/src/common/schemas/orms.py b/dispatcher/backend/src/common/schemas/orms.py
index d24ae79d2..a2d07e946 100644
--- a/dispatcher/backend/src/common/schemas/orms.py
+++ b/dispatcher/backend/src/common/schemas/orms.py
@@ -41,7 +41,6 @@ class Meta:
     added = auto_field()
     fingerprint = auto_field()
     key = auto_field()
-    last_used = auto_field()
     name = auto_field()
     pkcs8_key = auto_field()
     type = auto_field()
diff --git a/dispatcher/backend/src/db/models.py b/dispatcher/backend/src/db/models.py
index 1c77f30a9..394d4c6f7 100644
--- a/dispatcher/backend/src/db/models.py
+++ b/dispatcher/backend/src/db/models.py
@@ -133,7 +133,6 @@ class Sshkey(Base):
     type: Mapped[str]
     key: Mapped[str]
     added: Mapped[datetime]
-    last_used: Mapped[Optional[datetime]]
     pkcs8_key: Mapped[str]
     user_id: Mapped[UUID] = mapped_column(ForeignKey("user.id"), init=False)
 
diff --git a/dispatcher/backend/src/migrations/versions/ceae21f592b7_remove_ssh_key_last_used.py b/dispatcher/backend/src/migrations/versions/ceae21f592b7_remove_ssh_key_last_used.py
new file mode 100644
index 000000000..c6324e5ad
--- /dev/null
+++ b/dispatcher/backend/src/migrations/versions/ceae21f592b7_remove_ssh_key_last_used.py
@@ -0,0 +1,33 @@
+"""remove_ssh_key_last_used
+
+Revision ID: ceae21f592b7
+Revises: 43f385b318d4
+Create Date: 2023-09-29 10:59:39.739351
+
+"""
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = "ceae21f592b7"
+down_revision = "43f385b318d4"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column("sshkey", "last_used")
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column(
+        "sshkey",
+        sa.Column(
+            "last_used", postgresql.TIMESTAMP(), autoincrement=False, nullable=True
+        ),
+    )
+    # ### end Alembic commands ###
diff --git a/dispatcher/backend/src/routes/auth/__init__.py b/dispatcher/backend/src/routes/auth/__init__.py
index 77abc7d5a..888d0a826 100644
--- a/dispatcher/backend/src/routes/auth/__init__.py
+++ b/dispatcher/backend/src/routes/auth/__init__.py
@@ -10,7 +10,7 @@
 from common import getnow
 from db import dbsession
 from routes import API_PATH, authenticate
-from routes.auth import ssh, validate
+from routes.auth import ssh
 from routes.auth.oauth2 import OAuth2
 from routes.errors import BadRequest, Unauthorized
 from utils.check import raise_if, raise_if_none
@@ -125,6 +125,3 @@ def __init__(self):
         self.add_url_rule("/test", "test_auth", test, methods=["GET"])
         self.add_url_rule("/token", "auth_with_token", refresh_token, methods=["POST"])
         self.add_url_rule("/oauth2", "oauth2", OAuth2(), methods=["POST"])
-        self.add_url_rule(
-            "/validate/ssh_key", "validate_ssh_key", validate.ssh_key, methods=["POST"]
-        )
diff --git a/dispatcher/backend/src/routes/auth/validate.py b/dispatcher/backend/src/routes/auth/validate.py
deleted file mode 100644
index a6f9b74dd..000000000
--- a/dispatcher/backend/src/routes/auth/validate.py
+++ /dev/null
@@ -1,53 +0,0 @@
-import base64
-import binascii
-from http import HTTPStatus
-
-import paramiko
-import sqlalchemy as sa
-import sqlalchemy.orm as so
-from flask import Response, request
-from marshmallow import Schema, ValidationError, validate
-
-import db.models as dbm
-import errors.http as http_errors
-from common import getnow
-from common.schemas import String
-from routes import errors
-from utils.check import raise_if_none
-
-
-def ssh_key(session: so.Session):
-    """
-    Validate ssh public keys exists and matches with username
-    """
-
-    # validate request json
-    class KeySchema(Schema):
-        username = String(required=True, validate=validate.Length(min=1))
-        key = String(required=True, validate=validate.Length(min=1))
-
-    try:
-        request_json = KeySchema().load(request.get_json())
-    except ValidationError as e:
-        raise http_errors.InvalidRequestJSON(e.messages)
-
-    # compute fingerprint
-    try:
-        key = request_json["key"]
-        rsa_key = paramiko.RSAKey(data=base64.b64decode(key))
-        fingerprint = binascii.hexlify(rsa_key.get_fingerprint()).decode()
-    except (binascii.Error, paramiko.SSHException):
-        raise errors.BadRequest("Invalid RSA key")
-
-    # database
-    username = request_json["username"]
-    orm_ssh_key = session.execute(
-        sa.select(dbm.Sshkey)
-        .join(dbm.User)
-        .where(dbm.User.username == username)
-        .where(dbm.Sshkey.fingerprint == fingerprint)
-    ).scalar_one_or_none()
-    raise_if_none(orm_ssh_key, errors.Unauthorized)
-    dbm.User.check(orm_ssh_key.user, errors.Unauthorized)
-    orm_ssh_key.last_used = getnow()
-    return Response(status=HTTPStatus.NO_CONTENT)
diff --git a/dispatcher/backend/src/routes/users/keys.py b/dispatcher/backend/src/routes/users/keys.py
index 0125e45ec..0cdd5abcf 100644
--- a/dispatcher/backend/src/routes/users/keys.py
+++ b/dispatcher/backend/src/routes/users/keys.py
@@ -100,7 +100,6 @@ def post(self, username: str, token: AccessToken.Payload, session: so.Session):
             key=key,
             type="RSA",
             added=sa.func.current_timestamp(),
-            last_used=None,
             pkcs8_key=pkcs8_key,
         )
         ssh_key.user_id = current_user.id
diff --git a/dispatcher/backend/src/tests/integration/routes/conftest.py b/dispatcher/backend/src/tests/integration/routes/conftest.py
index 99faff3ea..33e54aa71 100644
--- a/dispatcher/backend/src/tests/integration/routes/conftest.py
+++ b/dispatcher/backend/src/tests/integration/routes/conftest.py
@@ -173,7 +173,6 @@ def _make_key() -> dict:
             ),
             "type": "RSA",
             "added": datetime.datetime(2019, 1, 1),
-            "last_used": datetime.datetime(2019, 1, 1),
             "pkcs8_key": "-----BEGIN PUBLIC KEY-----\n"
             "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuBGJjT33bHGmHDE13tDc\n"
             "UqUvuam1Tvlg2jC7fyS2w5qKyc8wWBSLcbK+Yb8SnJEN44FHXKCKs6cH44PPDYcX\n"
@@ -212,7 +211,6 @@ def _make_user(
                 key=key["key"],
                 type=key["type"],
                 added=key["added"],
-                last_used=key["last_used"],
                 pkcs8_key=key["pkcs8_key"],
             )
         )
@@ -234,7 +232,6 @@ def _make_user(
                         "key": key.key,
                         "type": key.type,
                         "added": key.added,
-                        "last_used": key.last_used,
                         "pkcs8_key": key.pkcs8_key,
                     }
                     for key in user.ssh_keys
diff --git a/dispatcher/frontend-ui/src/views/UserView.vue b/dispatcher/frontend-ui/src/views/UserView.vue
index 7f497f909..208a79feb 100644
--- a/dispatcher/frontend-ui/src/views/UserView.vue
+++ b/dispatcher/frontend-ui/src/views/UserView.vue
@@ -59,7 +59,6 @@
           <thead>
             <tr>
               <th>SSH Key</th>
-              <th>Last Used</th>
               <th>Fingerprint</th>
               <th v-if="canSSHKeyUsers">Delete</th>
             </tr>
@@ -67,7 +66,6 @@
           <tbody>
             <tr v-for="ssh_key in user.ssh_keys" :key="ssh_key.name">
               <td>{{ ssh_key.name }}</td>
-              <td v-tooltip="format_dt(ssh_key.last_used)">{{ ssh_key.last_used | from_now }}</td>
               <td ><code>{{ ssh_key.fingerprint }}</code></td>
               <td v-if="canSSHKeyUsers"><b-button variant="danger" size="sm" @click.prevent="confirmDelete(ssh_key)">Delete</b-button></td>
             </tr>