Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38e5aef721c7ba996cd81b85b97ed3f984aa3fc4fa8c5b7fb272889c83a4efda' 
  AND token = 'wIs5oZHiDIwb5pk9jIBys8eiTsWGtS0VP3IZl6G6b6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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