Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c09f3643b38ffa6e54d79cd8a901071a421c78eab87b0d953893484bfd9ffce' 
  AND token = '8S48hHllQ7A0IhiouD4dlM6DYw0H9cawbYUoRzmzpVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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