Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a57657fe59367f42c688d874e84b7c98976d21898e9af78b7592afeddf93ac05' 
  AND token = '7MayfmyuZ3mwQOGeRMq29OcvuSvoWvTzkN9tJDQwXkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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