Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067c02823a27aaae7ad5e313d0af35ba7ddc799a710b25fd9531831d2f03f087' 
  AND token = '7RySSCz+OdEsk1ynwvjYGHMeZQbR7uuMqPTTi+kZQqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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