[Query] [at] X does not select levels stored in Int. Palette

Are the Channels "in Live" in the Int Palette, and the Palette-Value is 35%
If so, you can Query with "Is_In".

Or is it that you are in Blind and look in to the Int Palette?

There is no way to do this, I have a feature request open about querying absolute values, see here.

I am in Live and I am looking for all channels that are at a certain percentage including those in an intensity palette. 

As Taylor C Jensen told us, this is not possible right know.

A workaround could be to make your Int Palettes (always) Absolute. This is an Option for the Palette itself.
But there is no longer a referenz to the Palette.

Theatermachine said:

This does not work even if the levels are visible (latch data) on the screen.

"Latch Data" is only interacting with the visualisation of Data for the user that is in front of the Desk.
That isn't changing anything in the EOS-Logic. 

This just removes the referenced data as a layer to query through, which would of course work, but I don't think is a real solution, most of the time when people are using palettes they need the data to remain referenced.