This does not mean "at this moment," but is used to draw attention to the important point that follows.
# let Pharaoh look
Joseph speaks to Pharaoh in third person. This is a way of showing respect. It can be stated in second person. AT: "You, Pharaoh, should look" (See: [[rc://en/ta/man/translate/figs-123person]])
The phrase "put him over" means to give someone authority. AT: "give him authority over the kingdom of Egypt" or "put him in charge of the kingdom of Egypt" (See: [[rc://en/ta/man/translate/figs-idiom]])
The word "fifth" is a fraction. AT: "let them divide the crops of Egypt into five equal parts, then take one of those parts" (See: [[rc://en/ta/man/translate/translate-fraction]])