Keys with built-in remote unlock buttons will take longer to make since the new transponder will need to be programmed to your vehicle. Plus, any additional wireless features may also need to be programmed into your car.
In terms of metal keys, most car dealerships will likely have the blank key ready to go! They’ll just need to cut it to match your car. But in rare cases, they may need to order it for you. If they do, it could take up to a few weeks for them to replace your key!