Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2570232656fef70e4e100c3c494f982420ba881db287af830718c9c64de95ad2' 
  AND token = 'kWKqfgZcY1K/1kw1mpvYcu2MdwNewTje/yCm0UHJ6sA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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