Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67c52ca26f235dc4e446efd42769bee67c87a886965b56e13c5586968a8cc906' 
  AND token = '5Z7CpGZQSM7HifREz8fhSQByWXWXDhM3B8gEjEBZrZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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