Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17f83e8e127edf699be424b3210fdd8dfc3cc9a9f4e64914e698579aede200dd' 
  AND token = '9O9Lre9dvg+gu9xai/Xj+E7jGL5sxRmf1+zVIdFiJjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}