diff --git a/app/vmselect/prometheus/prometheus.go b/app/vmselect/prometheus/prometheus.go
index 6bb8921b0..6d2b44866 100644
--- a/app/vmselect/prometheus/prometheus.go
+++ b/app/vmselect/prometheus/prometheus.go
@@ -699,6 +699,9 @@ func QueryHandler(qt *querytracer.Tracer, startTime time.Time, w http.ResponseWr
 		start -= offset
 		end := start
 		start = end - window
+		if start < 0 {
+			start = 0
+		}
 		// Do not include data point with a timestamp matching the lower boundary of the window as Prometheus does.
 		start++
 		if end < start {
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index b5fa32d46..5201d52bd 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -11,6 +11,8 @@ The following `tip` changes can be tested by building VictoriaMetrics components
 
 ## v1.93.x long-time support release (LTS)
 
+* BUGFIX: [vmselect](https://docs.victoriametrics.com/vmselect.html): properly determine time range search for instant queries with too big look-behind window like `foo[100y]`. Previously, such queries could return empty responses even if `foo` is present in database.
+
 ## [v1.93.10](https://github.com/VictoriaMetrics/VictoriaMetrics/releases/tag/v1.93.10)
 
 Released at 2024-01-17