Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f134901bd9b2cef1836246ead15b918fa0931e44002e52ff7955b8c4c7c13cc' 
  AND token = 'Jypup60fwTY3o4dmXs5dQCHF1IftA9U3Mrqq0r7cNCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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