Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1db27d4a6fbb97aaf03e619ad3351202522c09e583270a2832ec3d73bc4e151' 
  AND token = 'mFYfWWzOreDw1gaNYoT89Sq6OJ6VJKGlT/AQndVRyWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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