I’m on macOS and it’s alt-space.

Ctrl-space moves the cursor by “words inside words,” e.g. in theBestVariable, will go between “the” and “Best.” However it conflicts with the system ctrl-space that switch space. Not really an issue, because ctrl-shift-arrow will do the same word inside word move, but extending selection. In the end we can select until the desired location is reached, then hit a single left or right arrow to deselect and we’re there.