Need help to spend time at airport

Hey all, I'll be reaching airport at around 11pm. I know the aerohub exists but I've heard that the shops close by 10. Does anyone know exactly till what time aerohub is open(especially the food court)? And what all can be done post 11pm? Also small question, are packed food items(biscuits etc) allowed inside airport before checkin? Edit: Is it possible to stay at the airport until 6 am? (My flight is at that time)