Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d512b7605f4c6e7fdc6b80ad144e00e5fa52daa6056d6f85e8e1b2c13af6d7d' 
  AND token = 'M0ydZxNas58HauyU0JByI+U6y8d8KiDoTOiQT9aFxqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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