Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83bcb0505f836e0fde497c4797ff989a2d6b6f1bd5a4fa547f20a3c63825787f' 
  AND token = 'HAJLVfXoPvqd7qaxej9STnoZDhQoY5ANd2eo8xYz/nA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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