Query is running slowly in SQL server 2014

Following query is running if the database compatibility level is 120 (2014). It is running fine for lower level.

         

declare @dist Int,@rango int, @FI DATETIME,@FF DATETIME 

SET @FI = cast(convert(nvarchar,'2015-01-15 09:17:00.000') as datetime)
SET @FF = cast(convert(nvarchar,'2015-01-15 09:19:00.000') as datetime)

SELECT  * 
FROM [My_Database].[dbo].[My_table] with (nolock)
WHERE FechaEmision BETWEEN @FI and @FF and
 CodigoRuta = '00001' and 

Localidad = '01'

Structure of the table is:

Column_nameTypeComputedLengthPrecScaleNullableTrimTrailingBlanksFixedLenNullInSourceCollation
CodigoRutavarcharno6        yesno yesLatin1_General_CI_AS
FechaEmisiondatetimeno8        yes(n/a)(n/a) NULL
FechaSatellitedatetimeno8        yes (n/a)(n/a)NULL
Latituddecimalno9 18   8    yes(n/a)(n/a)NULL
Longituddecimalno9 18   8    yes(n/a)(n/a)NULL
Correlativointno4 10   0    yes(n/a)(n/a)NULL
Lotechar no10       yesno yesLatin1_General_CI_AS
Localidadvarcharno15        yesno yesLatin1_General_CI_AS

Index:

index_nameindex_descriptionindex_keys
IX_CapturaGalileononclustered located on PRIMARYCodigoRuta, FechaEmision, Latitud, Longitud