KISS (Keep It Super Simple) Just don't get stuck on something and check if your time has been productive since the last 45 min. It will create you the habit of evaluate your progress and if the time spent has been worth it or if you need a break for it.
Then
Send a notification from the IFTTT app
This action will send a notification to your devices from the IFTTT app.
Explore more great ways to automate Date & Time and Notifications