Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08a8c5285833b58054b35c612d61f4b78e172828e12fe7229fe27978185dc4ab' 
  AND token = 'ItgZw85ryJ327Zz5EkNbs0mtFVj/JY4lSX97x9KYiYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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