Do it in Acrobat. Use the file>extract command.
If you have Acrobat "Pro" (not just Acrobat reader), you can easily split your document into single pages.
Don't know how to achieve that from InDesign (not sure it's even possible...)
Also you can use sript.
let's say, this
However, for some reasons I personally prefer exporting single pdf, and then spliting it to separate pages in Acrobat.
Try both ways and choose.