Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505ff0ddb09b6cd033f22fb02eca3714b775009388da84a453644f986ff3131a' 
  AND token = 'QGNGYBqKbAkmzYu2AEQiU+EPq6ieB4QNTFrK9RUC1F0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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