Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93f5aab67026e6ea835dcd99813e48da952941827ff0d8958ca5e42141b82f65' 
  AND token = 'KJtUgvxgBuo0RdbslMsuGQBQiyC/dIMe73l2Rh/ltas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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