Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dda8de99d6ebbaf5ea7132d43c19a98dc607fc56c8eac701381ee76985a083b' 
  AND token = 'l10jlb6t90MqL//OZCKCIPWUKJmKGbmEcrxyYaENW2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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