Sandbox

SELECT 
  1 
FROM 
  cscart_aprilec_print_temp_designs 
WHERE 
  session_id = 'G3LH-AD7U-4M6W-IJ34-RY7G-NA58-ZB5Y-FA6J' 
  AND product_id = 133 
  AND expires_at > 1777137839 
  AND confirmed = 'Y' 
LIMIT 
  1

Query time 0.00041

JSON explain

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