Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '966b013ef51499a3bd9e247bf8f814673b28d5f5e6dc01f10b23a2f1b9b727e7' 
  AND token = 'DDQKO9WmyPLtSg02Pp7Skz3dU7EpQIh9DwnBJLDvpoU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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