Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89378750d9156d1f4cb38219cb6f8c9066573e79ec31455fc97a99d5456d3887' 
  AND token = 'jwmqJeLBdcnTdX1ZDJiB16fF7xAAYJ1TKIfxRyD8m1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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