Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a331f9e9b9a6f888b12c4190a3bcf733d1a1d8eca1b0388feac18f1fd7930abd' 
  AND token = '2c/n0alDAb0UZt9lXspEf1BykyaFyKoHPG49eFDCh7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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