Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '312e7fa33041dd71cd05d4d9ccc2b2e72b192ec10eb0aca8668ae4f034090724' 
  AND token = 'omNiddvC1zEDlOq+9de7aCSHxIHl8R7vHqIpu/Ue3gU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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