It looks like you copied the SQL from here, but it is not clear that you need the ST_Transform to SRID of 2223. Use the SQL @kttii included in a comment, and replace the 2223 with that number.
The way you have it written with the && operator, you are comparing bounding boxes rather than the line itself. This may give you unexpected results if a line curves around a lot. I suspect you would prefer ST_Intersects, so you would have something like this:
SELECT *
FROM pipeline_denorm
WHERE
ST_Intersects(pipeline_denorm.wkb_geometry,
ST_MakeEnvelope(-121.76986352563478,
37.85809027719253,
-121.19308129907228,
38.07462286323802,
4326
)
);
You only need to add the ST_Transform if the SRID of the wkb_geometry column is different than 4326.
