MySQL 8.0: Invisible Indexes
Invisible indexes are a new feature in MySQL 8.0 that provide the ability to mark an index as unavailable for use by the Optimizer. This means that the index will still be maintained and kept up-to-date as data is modified, but no queries will be permitted to make use of the index (even if the query uses FORCE INDEX index_name).…
Source: MySQL 8.0: Invisible Indexes
