Microsoft SQL Server Query Hints INDEX Hints
Example
Index hints are used to force a query to use a specific index, instead of allowing SQL Server's Query Optimizer to choose what it deems the best index. In some cases you may gain benefits by specifying the index a query must use. Usually SQL Server's Query Optimizer chooses the best index suited for the query, but due to missing/outdated statistics or specific needs you can force it.
SELECT *
FROM mytable WITH (INDEX (ix_date))
WHERE field1 > 0
AND CreationDate > '20170101'
