Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eea4f01dba32c6fdf303052d74e8ac67c3fbe59d6a3603961bbd10f27b4a0467' 
  AND token = 'giulJ+5bYvOvfu5aqbl5Punpa8gxcMaygeXUjPsZJnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}