I scanned my Model 3’s keycard with NXP TagInfo, and as indicated by CyBro, it reads as a JavaCard contactless smartcard. Some of the details:
# IC manufacturer:
NXP Semiconductors
# IC type:
Unknown IC
# Card OS type:
Athena SCS OS
# Application information:
Global Platform card manager present
-- NDEF ------------------------------
# No NDEF data storage populated:
-- EXTRA ------------------------------
# Global Platform information:
Java Card version 2.2
Global Platform version 2.1.1