Need to improve a query which is taking longer time

Hi All,

we have the requirement like based on attribute (non index) column , need to filter the data. could any of you please help me to improve the performance

SELECT  MAX (gl_date)           FROM AP_INVOICES_ALL 

          WHERE    attribute_category = 'abc'

             AND attribute6 = 'rewer'

             AND source = 'fdsd'

Plan

SELECT STATEMENT ALL_ROWSCost: 435,203 Bytes: 36 Cardinality: 1 

2 SORT AGGREGATE Bytes: 36 Cardinality: 1 

1 TABLE ACCESS FULL TABLE AP.AP_INVOICES_ALL Cost: 435,203 Bytes: 36 Cardinality: 1