Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4083ed4ab4c8462c7085eddbe9f19907d572a566e43e891376655b88989ba29c' 
  AND token = 'ogJXAtbUPEq7NgTEUvDQbZv0EJLThEXhUoruUNHd2eM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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