Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f08d9926aacc9c28b2640a54f634f489a328e00f1827d902645e5bedf560b42' 
  AND token = 'J0qOj5il5/9THXLCSSqnX6TNix3EfEgdv77W5Qi7FaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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