Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cce5987c928db614937aace0a7c61af412cc9797752784789efb2719d503e16' 
  AND token = 'ua+6ngkWZPAfUCyWUU6iC35nCxPpeLSOf85mIvY0yak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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