Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34b65423913b4b4792b6d112b6c88f105bfd5f2ab9531cf1ae4ecf1eb4fd8828' 
  AND token = 'CfD9v0sf00pAYoLu7hI4Xy6hiqPqNPDg//T2JhHseAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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