SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'en' 
  AND lang.name IN (
    'ec_paypal_subscription.sub_id', 
    'ec_paypal_subscription.plan_name', 
    'search_options', 'id', 'ec_paypal_subscription.sub_id', 
    'customer', 'date', 'ec_paypal_subscription.plan_details', 
    'actions', 'ec_paypal_subscription.every', 
    'ec_paypal_subscription.delete', 
    'ec_paypal_subscription.delete', 
    'ec_paypal_subscription.canceled', 
    'text_no_orders', 'ec_paypal_subscription.sub_id', 
    'ec_paypal_subscription.plan_name', 
    'search_options', 'id', 'ec_paypal_subscription.sub_id', 
    'customer', 'date', 'ec_paypal_subscription.plan_details', 
    'actions', 'ec_paypal_subscription.every', 
    'ec_paypal_subscription.delete', 
    'ec_paypal_subscription.delete', 
    'ec_paypal_subscription.canceled', 
    'text_no_orders'
  )

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "28.81"
    },
    "table": {
      "table_name": "lang",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "lang_code",
        "name"
      ],
      "key_length": "392",
      "rows_examined_per_scan": 12,
      "rows_produced_per_join": 12,
      "filtered": "100.00",
      "index_condition": "((`danishecarter_31jan`.`lang`.`lang_code` = 'en') and (`danishecarter_31jan`.`lang`.`name` in ('ec_paypal_subscription.sub_id','ec_paypal_subscription.plan_name','search_options','id','ec_paypal_subscription.sub_id','customer','date','ec_paypal_subscription.plan_details','actions','ec_paypal_subscription.every','ec_paypal_subscription.delete','ec_paypal_subscription.delete','ec_paypal_subscription.canceled','text_no_orders','ec_paypal_subscription.sub_id','ec_paypal_subscription.plan_name','search_options','id','ec_paypal_subscription.sub_id','customer','date','ec_paypal_subscription.plan_details','actions','ec_paypal_subscription.every','ec_paypal_subscription.delete','ec_paypal_subscription.delete','ec_paypal_subscription.canceled','text_no_orders')))",
      "cost_info": {
        "read_cost": "26.41",
        "eval_cost": "2.40",
        "prefix_cost": "28.81",
        "data_read_per_join": "4K"
      },
      "used_columns": [
        "lang_code",
        "name",
        "value"
      ]
    }
  }
}