thats how long the real c64 took to load games. in the options, if you turn on “warp” while it loads, it will speed up the emulation and load quickly. when its done loading, turn off warp.
if the game doesn’t use any fast loaders, you can also fiddle with the drive emulation modes in the configuration. Another thing to do, is to use a actionreplay/retroreplay rom, so you have a fast loader by default (you can save the default setting with an cart plugged in, then you will get faster loading speed).