Based on the very limited information provided so far: reduce the number of rows in the table or in your select statement (the former by archiving data and the latter by using a where clause with appropriate covering index).

If none of the above is an option please provide a more detailed information (how many rows, how many columns, total size of the table, is the time measure using SSMS on the SQL Server or is there a network in between, maybe even a frontend that might be the cause for the delay).