Both of them are unused (P5306), to no surprise: There are two distinct values in wb_terms_entity_type and three distinct values in wb_terms_type, thus an index makes no sense. Both indexes don't exist within the Wikibase code as of 4cf8b2fcf35df7fcf8c113cc1020385490009297.
For reference:
KEY `wb_terms_entity_type` (`term_entity_type`), # … KEY `wb_terms_type` (`term_type`),
This concerns all wikidatawiki servers, testwikidatawiki is not affected.