Why burgerking still being traded outside market hours?
It is still being traded on nse.
The orders which you are seeing are pending orders at exchange level, this will automatically get erased from the system by end of the day.
No check the last traded time
Similar to pre-market session, exchange also conducts a post-market session from 3:40 PM to 4 PM, there might be an order which might have executed in this session. Can learn more here.