Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb885f3d6c1c4b8b2e797a183432b14069dfeed5d8b83e26b233d7f286069249' 
  AND token = 'Q4UAy8znjS7HEwQES1o68L7Te7Zw7N+qvXE81NE3e8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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