Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb28909d83c70b099027a707d83671625c6767ec8cede651f695de4c43e78836' 
  AND token = 'kXimVX/TBg3DybdhIvss0rmW12A+At9/Tf3fQok2SPk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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