Hey @weiman99 take a look at this blog post, it will help you with your problem:
https://tutsforweb.com/how-to-set-up-task-scheduling-cron-job-in-laravel/
Basically you need a cron job that will run once an hour or once a day in your case, check which rows are expired, and notify those users.
And here is the documentation for it: https://laravel.com/docs/master/scheduling