Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1e3ca2faeef163f101b2b2232860cc9f3d6d8a38ba8d83a575bc7e2a12493b8' 
  AND token = '6lwrlQ8jRU6EvjYE+pxXKabs86hzZkISJrWiB3HfsLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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