Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4905cdaf0d832c51f2351ecc12174d4e97589fc51fec75f358b7e3aa9df8ce4' 
  AND token = 'dUAKisNjOa1kbZ22+72VOQb/HDTMaXwI35IJaGXNY24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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