Managing session with Laravel

Hello,

I'm trying to manage session with Laravel but i'm not sure to really understand.

I have an object with an expiration date stored in my database. I would like to change his state when the current time is equal to the expiration date. Do I have to use listener or sessions variable or something else ?

Same problem with my cart. I would like to empty the cart after 15min of inactivity (i am using Crinsane Cart).

Any ideas ?

Regards,

Jeremy