Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a56b1dd5e05b8c3e831f65447917c2ad500db114dd85d07575d02e6fd078c5dc' 
  AND token = 'EtPHryjf4DpqreRVC8dylZWzWCXEJJ+ClCKrHdgAcTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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