SELECT 
  cscart_product_sales.product_id, 
  amount AS sales_amount 
FROM 
  cscart_product_sales 
  LEFT JOIN cscart_products_categories ON cscart_products_categories.product_id = cscart_product_sales.product_id 
  AND cscart_products_categories.category_id = cscart_product_sales.category_id 
WHERE 
  cscart_product_sales.product_id IN (
    14005, 15746, 16337, 16336, 15745, 14662, 
    13464, 13998, 13933, 14148, 14678, 
    14131, 13465, 18481, 19930, 19598, 
    19599, 19602, 14142, 14138, 14133, 
    14137, 13497, 15734
  ) 
  AND cscart_products_categories.link_type = 'M'

Query time 0.00061

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.02870612,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_sales",
          "access_type": "index",
          "possible_keys": ["PRIMARY", "pa"],
          "key": "pa",
          "key_length": "6",
          "used_key_parts": ["product_id", "amount"],
          "loops": 1,
          "rows": 20,
          "cost": 0.00957962,
          "filtered": 100,
          "attached_condition": "cscart_product_sales.product_id in (14005,15746,16337,16336,15745,14662,13464,13998,13933,14148,14678,14131,13465,18481,19930,19598,19599,19602,14142,14138,14133,14137,13497,15734)",
          "using_index": true
        }
      },
      {
        "table": {
          "table_name": "cscart_products_categories",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY", "link_type", "pt"],
          "key": "link_type",
          "key_length": "9",
          "used_key_parts": ["link_type", "category_id", "product_id"],
          "ref": [
            "const",
            "u508912950_dev_2025.cscart_product_sales.category_id",
            "u508912950_dev_2025.cscart_product_sales.product_id"
          ],
          "loops": 20,
          "rows": 1,
          "cost": 0.0191265,
          "filtered": 100,
          "attached_condition": "cscart_products_categories.link_type = 'M'",
          "using_index": true
        }
      }
    ]
  }
}