Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '200247975b36f2ad9a672b3a00061bd7ff72723921f8972b3cd110c652d31092' 
  AND token = 'tPJ3aQzRu/8p+QY/1nmCcC4tP0WW0xj2FzciuA5ZYNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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