Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efd7cb58233b8626e3fe70fe868fe2f69f8b303f1802a8efdfde17b83dc04129' 
  AND token = 'G41ofnzRwWGU1kEAMgCvpfDdOpKjxI5Eh+CDLRztWGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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