your best bet (to optimize server resources) is to implement a timestamp column on the db record, and in the script where the user clicks the link to confirm, perform some logic that says "If DB timestamp is older than x minutes then reject" then just setup a cron job that runs every so often to prune the expired DB records. That way, you do not have a script CONSTANTLY running and checking/pruning the DB every 30 minutes. This is how the default laravel account confirmation works if I am not mistaken (without the cron pruning).

Thanks for your reply helped me a lot but is there a docu or a tutorial for this? I have never done this before with larval. So every time the user sends a confirmation link i have to check the table with an timer function is that right?