Sybase ASE - Query Tuning - Need Suggestion

Dear Team
Please provide suggestion on below query which is used in Sybase Adaptive Server Enterprise/15.7 (ASE).

Query takes more time > 30 Mins to 1 Hr
All required indexes are built
Can we have any efficient approach to get the data retrieval faster for below query.Any help appreciated.

 
 SELECT B.Name,P.Products_Name
 FROM
 Brands B, --Has 125671
 Products P -- Has 4894382 ( Huge records)
 WHERE
 B.Brand_ID >= P.ACCT_ID
 AND B.Brand_ID <= P.SLD_ID