Can I use Creality bed on Prusa MK3S?
Heaters won't match.
The ender3 is a 24 V machine. The Prusa 3 is a 12 V machine. Heater cartridges and Heatbeds are therefore not interchangeable.
Build surfaces can be adapted.
The Ender3 has a build surface that is a little bigger than the Prusa3, and thus you can, in a pinch, use an ender3 sized build surface and install it, possibly cut down, to fit onto the Prusa.