How improve such query?

hi!
I have a table about following structure
Table = crs
+-------------------------------+--------------------------------+-------+
| Field | Type | Length|
+-------------------------------+--------------------------------+-------+
| crs_stop | char() | 32 |
| crs_dir | char() | 32 |
| crs_time | int4 | 4 |
| crs_opt | char() | 3 |
+-------------------------------+--------------------------------+-------+
Index: crs1_idx

and need speed up following query:
SELECT * FROM crs c1 WHERE c1.crs_stop='_some_stop' AND
c1.crs_dir='some_direction' ORDER BY c1.crs_time;

I built index:

+-----------------------------+----------------------------------+-------+
| Field | Type | Length|
+-----------------------------+----------------------------------+-------+
| crs_stop | char() | 32 |
| crs_dir | char() | 32 |
+-----------------------------+----------------------------------+-------+
but

EXPLAIN SELECT * FROM crs c1 WHERE c1.crs_stop='_some_stop' AND
c1.crs_dir='some_direction' ORDER BY c1.crs_time;
shows following:

NOTICE: QUERY PLAN:

Sort (cost=160.92 rows=1 width=40)
-> Seq Scan on crs c1 (cost=160.92 rows=1 width=40)

EXPLAIN

so it doesn't use index.
What am I doing wrong?
Thanks in advance
Rem

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Remigiusz Sokolowski e-mail: rems(at)gdansk(dot)sprint(dot)pl * *
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