We keep all of our keys on this board that has these hook shaped things. Each key is on its own numbered tag that has a special shaped notch. The notch fits into the hooks on the board.

They also make these in a lockable cabinet format.

They make all sorts of variants. Fairly cheap too.

https://www.amazon.com/dp/B07FY86P8L/ref=cm_sw_r_cp_api_i_UJvfCbYNCBP5K