I would say you're looking pretty good. You're nowhere near your tMax and there doesn't appear to be any throttling, which would indicate that temps are too high, so all good.
To go back to your original question though, my answer seems a bit vague.
In actuality, if you increase your clock speed, without increasing voltage, yes it will degrade your chip faster even though you haven't raised voltage, because your processor is still doing more, which requires more power. Voltage allows your processor to have the power to use.
But the degradation, at stock voltage, as long as your temps remain fine, is so negligible that you shouldn't even worry about it.
Cheers mate