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SELECT 
  product_id, 
  combination_hash as exception_id, 
  combination 
FROM 
  cscart_product_options_inventory 
WHERE 
  product_id = 275133 
  AND amount <= 0

Query time 0.00072

JSON explain

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