SELECT 
  go.grid_id, 
  go.options 
FROM 
  cscart_grid_options AS go 
WHERE 
  go.grid_id IN (
    '94', '95', '96', '103', '104', '277', 
    '273', '114', '274', '115', '276', 
    '108', '113'
  )

Query time 0.00052

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "go",
      "access_type": "ALL",
      "possible_keys": ["PRIMARY"],
      "rows": 39,
      "filtered": 33.33333206,
      "attached_condition": "go.grid_id in ('94','95','96','103','104','277','273','114','274','115','276','108','113')"
    }
  }
}