Cell Locked or Unlocked depending on another CELL value

• Right-click on the sheet tab
• Select View Code from the pop-up context menu
• Paste the code below in the VBA edit window
• Change the password "Secret" to suit.

Private Sub Worksheet_Change(ByVal Target As Range)
    
    If Target.Count = 1 Then
        
        If Not Intersect(Range("F3:F10002"), Target) Is Nothing Then
            
            Me.Protect Password:="Secret", UserInterfaceOnly:=True
            
            Select Case Target.Value
            
                Case "FCL": Target.EntireRow.Range("K1:L1").Locked = False
                
                Case Else: Target.EntireRow.Range("K1:L1").Locked = True
                
            End Select
        End If
    End If
End Sub