Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24e5962ffab8f1d607c069d1fe4635d8ea4d42adff44b2e2a0fa669fed2278d8' 
  AND token = 'sayvZhA8XIlh6OeXsmo3jruFVLDZVVq6pd8mkvZA6ww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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