I have a quick question; how can I do sprite masking without AND logic?

you need two copies of your sprite: a black mask and the sprite itself.

The black mask represents all areas of your sprite that you want transparent and the ones that aren't. The black areas are the ones that aren't. First, you display your mask using the OR logic (all black pixels from your sprite turns the screen pixels black, white ones won't change anything.) Then you display your mask again but using the XOR logic, which inverts the area that got turned black to white. Once done, display your regular sprite using the OR logic.

I don't think he will since it can already be done like me and BBoy posted. However, if you use masking a lot in your games, you can simply put both sprites near each others in your tile sheets and use sub-routines to prevent repetitive code

Efficiency or readability... hm... You could always just make a special hex editor that supports masked sprites and gives the hex for both masks.
Also, something that wasn't mentioned: you can also use such masking to invert areas, in addition to white, black, or untouched (transparent). With what builderboy mentioned, in the second mask you put black where in the first mask you put white, and, while it cannot be done with DJ's method as-is, replacing that final OR with an XOR and using black where there was white the first mask does the trick.

Sorry, but could you provide example code of BuilderBoy and DJ Omnimaga description?
I am having difficulties understanding the steps and it looks interesting.

Thanks, I got it.