AFAIK ALL cars with the "keyless" ignition have a backup method of starting the car. The two most common are placing the fob very close to the ignition button, or a key slot somewhere else in the car, often in the glovebox.
Went to get gas and groceries one day. DW got of of the car to walk to the grocery store while I was in the gas line. DW was about 50 yards away when car warned me it would shut off since could no longer sense a key....... Didn't realize I didn't have my key with me and it was DW's key in her purse that let me start the car. Yelled across the parking lot for her to come back!