SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    982, 981, 983, 828, 421, 647, 315, 624, 
    937, 1131, 671, 670, 42, 43, 1051, 936, 
    935, 599, 900, 44, 404, 835, 836, 1263, 
    322, 311, 312, 744, 742, 837, 537, 839, 
    621, 1048, 1049, 1014, 575, 1034, 1243, 
    1073, 1295, 497, 704, 700, 702, 705, 
    709, 698, 1273, 1134, 607, 1092, 584, 
    1132, 446, 492, 461, 399, 649, 1129, 
    930, 931, 977, 929, 1020, 928, 749, 40, 
    416, 405, 427, 444, 827, 826, 595, 485, 
    486, 838, 549, 660, 546, 1260, 978, 979, 
    401, 400, 457, 462, 516, 564, 321, 989, 
    987, 988, 748, 502
  )

Query time 0.00315

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 96,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (982,981,983,828,421,647,315,624,937,1131,671,670,42,43,1051,936,935,599,900,44,404,835,836,1263,322,311,312,744,742,837,537,839,621,1048,1049,1014,575,1034,1243,1073,1295,497,704,700,702,705,709,698,1273,1134,607,1092,584,1132,446,492,461,399,649,1129,930,931,977,929,1020,928,749,40,416,405,427,444,827,826,595,485,486,838,549,660,546,1260,978,979,401,400,457,462,516,564,321,989,987,988,748,502)"
    }
  }
}