Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e098c2effc079fd177010c63cc87a04be7b84ca6b207eb3bd0125c63214f2b8' 
  AND token = 'ZGvhHpv8VoGSK9a0dWzz+m9wKzSyaWSy/cr+LfniUtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}