Running a query with where clause which has one tag and one field

An influx measurement has 2 million record. It consist of 4 tags and 8 fields. I am running a query with where clause which has one tag and one field. The query result is 1000 records and it’s taking 4 seconds

Flux or InfluxQL? Can you post your query here?

Thank you for your response!
Its timeseries Influx DB . PF below query
Select * from where = ‘abc’ and = ‘xyz’