FIG. 1 is a front right perspective view of an ornamental design for a key locator according to the present invention;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a back elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
All portions shown in broken lines are environmental and illustrative only, and form no part of the claimed design.