CSC Car Keys is serving St Charles, MO & surrounding areas. Dependable Automotive Locksmith Experts At CSC Car Keys, it’s our dedication that differentiates us from other automotive locksmiths. Quick, Reliable Service. Lose all your keys or want an extra key? No worries.. We are mobile and can cut and program keys on the go in the Saint Charles and Saint Louis areas. We have a large stock of keys, fobs, and key accessories. We have all your key needs.