SELECT 
  lang.name, 
  lang.value 
FROM 
  cscart_language_values lang 
WHERE 
  lang.lang_code = 'en' 
  AND lang.name IN (
    'ec_paypal_subscription.purchase_option', 
    'ec_paypal_subscription.one_time_purchage', 
    'ec_paypal_subscription.from', 
    'ec_paypal_subscription.each', 
    'ec_paypal_subscription.subscribe_and_save', 
    'ec_paypal_subscription.yearly', 
    'ec_paypal_subscription.every', 
    'ec_paypal_subscription.monthly', 
    'ec_paypal_subscription.every', 
    'ec_paypal_subscription.weekly', 
    'ec_paypal_subscription.every', 
    'ec_paypal_subscription.day', 'ec_paypal_subscription.every', 
    'ec_paypal_subscription.purchase_option', 
    'ec_paypal_subscription.one_time_purchage', 
    'ec_paypal_subscription.from', 
    'ec_paypal_subscription.each', 
    'ec_paypal_subscription.subscribe_and_save', 
    'ec_paypal_subscription.yearly', 
    'ec_paypal_subscription.every', 
    'ec_paypal_subscription.monthly', 
    'ec_paypal_subscription.every', 
    'ec_paypal_subscription.weekly', 
    'ec_paypal_subscription.every', 
    'ec_paypal_subscription.day', 'ec_paypal_subscription.every'
  )

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "24.01"
    },
    "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": 10,
      "rows_produced_per_join": 10,
      "filtered": "100.00",
      "index_condition": "((`danishecarter_31jan`.`lang`.`lang_code` = 'en') and (`danishecarter_31jan`.`lang`.`name` in ('ec_paypal_subscription.purchase_option','ec_paypal_subscription.one_time_purchage','ec_paypal_subscription.from','ec_paypal_subscription.each','ec_paypal_subscription.subscribe_and_save','ec_paypal_subscription.yearly','ec_paypal_subscription.every','ec_paypal_subscription.monthly','ec_paypal_subscription.every','ec_paypal_subscription.weekly','ec_paypal_subscription.every','ec_paypal_subscription.day','ec_paypal_subscription.every','ec_paypal_subscription.purchase_option','ec_paypal_subscription.one_time_purchage','ec_paypal_subscription.from','ec_paypal_subscription.each','ec_paypal_subscription.subscribe_and_save','ec_paypal_subscription.yearly','ec_paypal_subscription.every','ec_paypal_subscription.monthly','ec_paypal_subscription.every','ec_paypal_subscription.weekly','ec_paypal_subscription.every','ec_paypal_subscription.day','ec_paypal_subscription.every')))",
      "cost_info": {
        "read_cost": "22.01",
        "eval_cost": "2.00",
        "prefix_cost": "24.01",
        "data_read_per_join": "3K"
      },
      "used_columns": [
        "lang_code",
        "name",
        "value"
      ]
    }
  }
}