You got that answer because you are doing something out of order, and this is obvious from the fact you claim to have one available key with two chests. To this point in the game (now 23% complete), every update is 1 chest, 1 key. So I'm not sure which key to tell you to get, not knowing which ones you have.
You cannot advance time forcibly in the game. The event is either not triggered yet or the person is there, just not the one you expect.
I suggest finding
DD69-1's YouTube walkthroughs, and following them. Each one, one per update, is posted in this thread. They are always beginning to end what you need to do to finish the update.
Dylan741: I'm guessing you've used your patience quota for the month?
sixart: I still think you are funny! At least you answer my questions!
Omnikuken: Yes, you are new here.