Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8167684cbb6ef0e37a593e2a977d757771e61fe7eb277db29292cf7407c43c12' 
  AND token = '+1YRxY4Lil/yRqA9T49+AgnYG3VAM8fWU/uiUJITikY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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