Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a190a9fb6e45f45664b53b017b632332e0872a8ed544f70970f466b31583f00' 
  AND token = 'dKhHrEqfylbELUEkgi14eNfmKAMGzkk+c6BcaaS+UJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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