Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f59c2721af877f624f57338b9f1abcc52d1d12fbf0270262b5ac3823800e5288' 
  AND token = 'QgI/jhYe1rQK9CgG+crtNtOCdR2MB6uWN1aVu0BnAF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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