Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44e623cd430b31924cf19cf8863489e295a308c728d6acf52d245f2247291900' 
  AND token = 'U4zY+7i42bYHODrKp+3R2OpNR4SjMdlSIhxiGZV+WXE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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