SELECT 
  scripts.* 
FROM 
  tmall_ab__eb_scripts scripts 
WHERE 
  1 
  AND scripts.type = 'PriceTracking' 
  AND scripts.storefront_id = 1

Query time 0.00975

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.00345856,
    "nested_loop": [
      {
        "table": {
          "table_name": "scripts",
          "access_type": "ref",
          "possible_keys": ["eb_scripts__storefront_type"],
          "key": "eb_scripts__storefront_type",
          "key_length": "81",
          "used_key_parts": ["storefront_id", "type"],
          "ref": ["const", "const"],
          "loops": 1,
          "rows": 1,
          "cost": 0.00345856,
          "filtered": 100,
          "index_condition": "scripts.`type` = 'PriceTracking'"
        }
      }
    ]
  }
}