Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a49a422a54bd4c94774b2bd25ffe50115d20de26b8c895cee053353ec3cef517' 
  AND token = 'xGUAXv+U4l1JIQUGr/M/vjj4TqnOUQIEEXthCKDfEkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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