What is the fastest way to shutdown unrooted Android phone?

Sometimes I need to have my phone shut down as fast as possible. In older phones I was able to remove the battery, but after some "innovations" this feature is no longer present. Is there any better option than using casual shutdown and waiting for long seconds until it gets down? It is especially bad when I pour water on my phone and the touchscreen refuses to work. I am using Xiaomo Pocophone F1 with Android 9.0.