Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d7206e6ccb9b3ead2db5c79fed0ce8579dba3ba6b5b58dd25d07338595821c3' 
  AND token = 'VJsBwwRtOnAq9ZttVyVpe4jd1cr/LJqkxXBq/azSU/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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