In neo4j-shell you can
list legacy indices with index --indexes
list all label indices and constraints with schema
list indices and constraints for specific label with schema ls -l :YourLabel
In neo4j-browser you can
list all label indices and constraints with :schema
list indices and constraints for specific label with :schema ls -l :YourLabel
R. Pickhardt, T. Gottron, A. Scherp, S. Staab, and J. Kunze. 2012 International Conference on Privacy, Security, Risk and Trust, PASSAT 2012, and 2012 International Confernece on Social Computing, SocialCom 2012, Amsterdam, Netherlands, September 3-5, 2012, page 123--133. (2012)