Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '388c7824ab824de292a58ee82a8445cf0c662c4cb50d85de759295caeaedbda7' 
  AND token = 'lCNZgf9VcC9HSYOycAJ5wlgAMKTVY1VPwAxA/PyOyLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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