Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7942d0c073abb575bdf83297d38625d703a3d8b31192ccb6150be0277cbd3e30' 
  AND token = 'Kh8DJ/tRCqvkINqhNFwU5PJcYpaJ3AhyxCegHn3+Zho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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