I usually give a snake a couple of days to settle in. Then, depending on feeding schedule, I may handle it for a brief period of time. Once you know the snake will eat in its new home, you can start handling it. Give it a couple days after feeding before you take the snake out so it can get digestion started. If the snake is preparing to shed, you may want to wait until the shed is complete as some snakes are more defensive during shedding. Good luck with your new MBK. Mine is a very calm snake during handling and eats very well. Some have a strong feeding response so you may want to stay out of the way of their food!
Lora