Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bb0092a3200ef2ad385b8396c72bcb8c344f978baaa418beae7d892356e9b8a' 
  AND token = '6we/2gFSZ6zsgIXkFmGMaHrk6lxJhgHAL75JoWAateU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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