Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9257de8f4e63f463247ec53ac48583469542cfd521cd6907fb5c9092ecd1917c' 
  AND token = 'YiGU1V9N8TNOBmqp5NrJKsuSKDpl7cs8E8bMdxMmvEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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