How to show audio keyframes in Adobe Premiere CC?
You need to expand the track to be large enough to see the waveforms and overlaid keyframes.  Mouse over the horizontal line that divides A2 from A3, drag downward, and your waveforms and keyframes should be revealed.

If you right-click in the waveform area, you have the option as to which keyframes it will display in the window.  By default it's Volume:Level, but it could be Panner:Balance (or others).