Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aba3b06e9606f5c098da7f34064b08a70eea4534b6e864e0dff1a87060d5ced' 
  AND token = 'LbVQJKmSsxxgh0jfTdQCGGig2FCcf6QQNc6vOSCoRGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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