Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '520504b4124dc0bafb2525ab950b41d13e5923bf90e61065500b0bc3de1f77c6' 
  AND token = 'i6OZBsw7zqgWMln2ZAatebuO+QDjkiF/s1x0vo9sYnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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