Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '771184fb2449d5240f725e6f7e03902e2761766ede672dd92366c9478cb6a4cc' 
  AND token = 'H03XcdnaUVbAJlsdmF8AJw4LsiZzgGbj93CkOdYlUZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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