Transaction not yet indexed

MKEUSft4aLRmmyAk3wvG4CG9Zw2NzU6gGLCHrwhTkDfj3jyxAKH3KKWWcEJnCGeB7usJyB2i8PcD4swdEcY4Jcm

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.