Evernote doesn't make it easy to get what it calls the "classic" note to link to a note in the Evernote app as opposed to the web version (why I have no idea).
The way access the classic note link is implemented, no ordinary keystroke would work, and all attempts to get it to work with KM confounded me for quite a while.
I happy to report I finally figured out how to make a keystroke to copy the "Classic" note link by placing the mouse over the note and hitting a keystroke (Control-L in my version).
If there's a cleaner way to do this I'd love to know!!