Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd12f68b9da4c9bcec6cd136e2b837faad1fc5b0eec7f3c85fa7213d24df67b' 
  AND token = 'duleB8eIG534ReFej0x7SqWt3TkSd0dntcvIJahnH88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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