SELECT 
  * 
FROM 
  cscart_image_gallery_settings 
WHERE 
  id = 138 
  AND type = 'C'

Query time 0.00057

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}