Does the iPhone 5s come with a SIM card key?

So, long story short, i'm getting the iPhone 5s for full price and unlocked (never been used though) and i'm doing this because i have a phone that the contract isn't expired yet so does the iPhone come with a key? If not, can I use anything else to open it? Also, what type of SIM card does the 5s need? I have an LGC395 so, i don't know will it fot into the 5s

The 5s comes with a micro sim card tray, you can cut your sim card and put it into the 5s and then go to setting > contacts, emails and calendar. And copy your sim card contacs.