Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31d3993558c66160511ec5f8e1459f230a68c32b43cc67175ad4a511773b99b1' 
  AND token = 'ltn/1yCQftXJJdpQby0fliWR2MkqFBtZSzU49pLTfto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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