Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdf1f1332009c79c2cef08cf7b6c3db8b639ca59b86efe685d053c26fca5e59b' 
  AND token = 'gj3WQM4hz3xVEufom02abwOdhZLnH0oCAVn7+XfhHF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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