Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69f20a00c78193d05bd9cd10678a48c38df2bfed38eed79e53b8ebf4e15466b8' 
  AND token = 'DTawcBtQAc866TLILZrCp38hidMcRAWi+h3zilr6GQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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