You could create a new "Run NSAppleScript" action with the following code:
on alfred_script(q)
tell application "Notes"
-- Show user requested note
-- Get note id which is first item in q
set noteID to text 1 thru ((offset of "?" in q)-1) of q
show note id noteID in default account
show note id noteID in default account
-- Click menu Window -> Float Selected Note
tell application "System Events" to tell process "Notes" to click menu item 11 of menu 7 of menu bar 1
end tell
end alfred_script
