SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b60f293bbeefe919c3dd2387d99b2a6f336eac462dfe04a55dc53317ec6e072' 
  AND token = 'rRl1vwjmgnti8JqCjKJ5iDhMk1ZZjO9Hh0z03/xKJ0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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