Sandbox

SELECT 
  1 
FROM 
  cscart_aprilec_print_temp_designs 
WHERE 
  session_id = 'I3IW-4W10-7Z1P-M3T4-2S1T-FQQO-JKIC-5MW3' 
  AND product_id = 230 
  AND expires_at > 1777400106 
  AND confirmed = 'Y' 
LIMIT 
  1

Query time 0.00044

JSON explain

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