SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1b1e02400f95c25bf4349df76de8afa14c0216baa6bc926da836375dbc93d0' 
  AND token = 'uyLGAf++4qxHNsVBugQFKBDx7aFQnFuEKjsiYV+w2kE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}