Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8230202edd5ff8c27803180268ed69ab7c912cd5e771f2b28008f5350629c174' 
  AND token = '4i42U/nUMJfKOXpAb1d6hD89e/WVSwLdY4aVlU+oNMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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