MySQL - 'Using index condition' vs 'Using where; Using index'

Using index condition : where condition contains indexed and non-indexed column and the optimizer will first resolve the indexed column and will look for the rows in the table for the other condition (index push down)

Using where; Using index : 'Using index' meaning not doing the scan of entire table. 'Using where' may still do the table scan on non-indexed column but it will use if there is any indexed column in the where condition first more like using index condition

Which is better? 'Using where; Using index' would be better then 'Using index condition' if query has index all covering.

If you watch this link: https://dev.mysql.com/doc/refman/5.7/en/index-extensions.html

It explain that when 'Column Extra' says 'Using Index Condition', all columns in where condition are using index. If there are any columns out of index, then Column Extra say Using Where, Using Index (in this case, Mysql need look for in data row to apply where clause). It's better 'Using Index Condition'.