Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00f0b912e4e92ec00d8b2dc4910399eb56dd2582bda1e8a47158e0728efc2819' 
  AND token = '4TQSqnvvqoHauLWzfpivsU0IQmQaVL6y3nQbSLv7EKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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