Optimizing index performance for mysql
Beware!  You have an extra space in some table and column names.  (I removed them when wrapping the queries.)

This is the optimal index for all those queries, and there is no benefit in saying USE INDEX:

INDEX(EventType, event_log_domain_id)  -- in this order
INDEX(event_log_domain_id, EventType)  -- in this order for #3


This index will handle the WHERE and be "covering".  Include both indexes.

More on indexing:  http://mysql.rjweb.org/doc.php/index_cookbook_mysql  It explains how the composite index should start with all columns tested with =, then move on to IN, and finally one "range".  (Your examples have no ranges).