Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d6b8b05e959e50f8bc3151bf3eec243191b7d6ae09a99be6eb185ab7edbf624' 
  AND token = '1H/ljL7Zz45C751vmr/1qSECA2HUH/f77RhaZHhJv0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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