diff --git a/src/Interpreters/convertFieldToType.cpp b/src/Interpreters/convertFieldToType.cpp
index 4e7562ef451e..fdbae838ab41 100644
--- a/src/Interpreters/convertFieldToType.cpp
+++ b/src/Interpreters/convertFieldToType.cpp
@@ -218,10 +218,11 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
         }
 
         if (which_type.isDateTime64()
-            && (which_from_type.isNativeInt() || which_from_type.isNativeUInt() || which_from_type.isDate() || which_from_type.isDate32() || which_from_type.isDateTime() || which_from_type.isDateTime64()))
+            && (src.getType() == Field::Types::UInt64 || src.getType() == Field::Types::Int64 || src.getType() == Field::Types::Decimal64))
         {
             const auto scale = static_cast<const DataTypeDateTime64 &>(type).getScale();
-            const auto decimal_value = DecimalUtils::decimalFromComponents<DateTime64>(applyVisitor(FieldVisitorConvertToNumber<Int64>(), src), 0, scale);
+            const auto decimal_value
+                = DecimalUtils::decimalFromComponents<DateTime64>(applyVisitor(FieldVisitorConvertToNumber<Int64>(), src), 0, scale);
             return Field(DecimalField<DateTime64>(decimal_value, scale));
         }
     }
diff --git a/src/Storages/MergeTree/KeyCondition.cpp b/src/Storages/MergeTree/KeyCondition.cpp
index caddb85263df..27664753bad8 100644
--- a/src/Storages/MergeTree/KeyCondition.cpp
+++ b/src/Storages/MergeTree/KeyCondition.cpp
@@ -1172,7 +1172,8 @@ bool KeyCondition::transformConstantWithValidFunctions(
 
             if (is_valid_chain)
             {
-                auto const_type = cur_node->result_type;
+                out_type = removeLowCardinality(out_type);
+                auto const_type = removeLowCardinality(cur_node->result_type);
                 auto const_column = out_type->createColumnConst(1, out_value);
                 auto const_value = (*castColumnAccurateOrNull({const_column, out_type, ""}, const_type))[0];
 
diff --git a/tests/queries/0_stateless/02457_key_condition_with_types_that_cannot_be_nullable.reference b/tests/queries/0_stateless/02457_key_condition_with_types_that_cannot_be_nullable.reference
new file mode 100644
index 000000000000..13b65c29f05d
--- /dev/null
+++ b/tests/queries/0_stateless/02457_key_condition_with_types_that_cannot_be_nullable.reference
@@ -0,0 +1 @@
+printer1
diff --git a/tests/queries/0_stateless/02457_key_condition_with_types_that_cannot_be_nullable.sql b/tests/queries/0_stateless/02457_key_condition_with_types_that_cannot_be_nullable.sql
new file mode 100644
index 000000000000..690ec6c70e0b
--- /dev/null
+++ b/tests/queries/0_stateless/02457_key_condition_with_types_that_cannot_be_nullable.sql
@@ -0,0 +1,9 @@
+drop table if exists test;
+
+create table test (Printer LowCardinality(String), IntervalStart DateTime) engine MergeTree partition by (hiveHash(Printer), toYear(IntervalStart)) order by (Printer, IntervalStart);
+
+insert into test values ('printer1', '2006-02-07 06:28:15');
+
+select Printer from test where Printer='printer1';
+
+drop table test;