Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '970fa1dcb431dd00c602fe973de9446ead0c5a8f6b62bdc7e682b07fd5f18cc5' 
  AND token = '/RLqLAA1WKHEP6/QhOHNqL17MHBjW5FLHf07eLjYWFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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