Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04b3cf5894f920ef093f3af9aae855572c22d09ec5a53bc464fc8c215b645cba' 
  AND token = '45YkWBK8Eir0J/uJ/7e/RQhDiUPoWbJy8cpgVLoldeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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