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SELECT 
  cscart_ult_product_prices.product_id, 
  MIN(
    IF(
      cscart_ult_product_prices.percentage_discount = 0, 
      cscart_ult_product_prices.price, 
      cscart_ult_product_prices.price - (
        cscart_ult_product_prices.price * cscart_ult_product_prices.percentage_discount
      )/ 100
    )
  ) AS price 
FROM 
  cscart_ult_product_prices 
WHERE 
  cscart_ult_product_prices.product_id IN (
    5764, 5765, 5766, 5767, 5768, 5769, 5770, 
    5771, 5772, 5773, 5774, 5775, 5776, 
    5777, 5778, 5779, 5780, 5781, 5782, 
    5783, 5784, 1986, 1987, 1988, 1989, 
    1990, 1991, 1992, 1993, 1994, 1995, 
    1996, 1997, 1998, 1999, 2000, 2001, 
    2002, 2003, 2004, 2005, 2006, 2007, 
    2008, 2009, 2010, 2011, 2012, 2013, 
    2014, 2015, 2016, 2017, 2018, 2019, 
    2020, 2021, 2022, 2023, 2024, 2025, 
    2026, 2027, 2028, 2029, 2030, 2031, 
    2032, 2033, 2034, 2035, 2036, 2037, 
    2038, 5668, 5669, 5670, 5671, 5672, 
    5673, 5674, 5675, 5676, 5677, 5678, 
    5679, 5680, 5681, 5682, 5683, 5684, 
    5685, 5686, 5687, 5688, 5689
  ) 
  AND cscart_ult_product_prices.lower_limit = 1 
  AND cscart_ult_product_prices.company_id = 1 
  AND cscart_ult_product_prices.usergroup_id IN (0, 0, 1) 
GROUP BY 
  cscart_ult_product_prices.product_id

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}