Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5471e4895b3b81dc804a5ac3cf36c5782a97511d47c8037cca60b9bd7ed6defa' 
  AND token = 'HN+hGATn22J3lVceB2P/0ALW+Kg7Og2TXIywacol5VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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