Query on large table using DateTime WHERE clause

I'm attempting to query data from a rather large table, approximately 98 million rows, using datetime columns in the WHERE clause. It takes approximately 12 minutes to complete - which is obviously not acceptable. The query is simple:

SELECT ID, DateTime1, DateTime2, Value1, Value2
FROM dataTable
WHERE DateTime1 >= '2017-05-15 09:00' AND
      DateTime1 <= '2017-05-15 09:30'

The table has the following structure:

Column Name | DataType
-------------------------
ID          | float
DateTime1   | datetime
DateTime2   | datetime
Value1      | float
Value2      | varchar(20)

The table has the following index:

Nonclustered: DateTime1, DateTime2, ID, Value2