Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c8ba95b18f62ae9351ab778879152fa0faaa03ab583dcaf6035cb2fb4c0499' 
  AND token = 'M+LQY9wEpQ54PT/jxwPgkRYNO61EZQ7CjoP5LrFqeA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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