When testing superfecta lookup sources, nothing touches Asterisk so no point in looking for logs there. There is a dropdown menu in the superfecta test for increasing debug output.
Superfecta has two stages, in the first stage it polls all the sources to find a CID name. If (and only if) a name is found, it then polls all the sources for send-to actions. So the 0.0005 response time is for the first phase when there is no lookup to. After all sources have been polled and a name has been found, it does the “Executing Send to URL” again, this time to send data to the URL, which is where the additional output shows in the debug.