To pick the index leading key of index needs to be part of query predicate.
Try the following.
explain select * from products WHERE autocompleteMacroRankingPosition IS NOT MISSING ORDER BY autocompleteMacroRankingPosition ASC limit 7;
To pick the index leading key of index needs to be part of query predicate.
Try the following.
explain select * from products WHERE autocompleteMacroRankingPosition IS NOT MISSING ORDER BY autocompleteMacroRankingPosition ASC limit 7;