Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1497c3396815ea489a93b161551e60f68ab7e80dd83d4f4e0d36a71da54f0b42' 
  AND token = 'YZqu+jIGKx8b173Kx8DpCDk9bPrk7PkKbGWJXw3u9M4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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