Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19e1040ddd34e0cb8c5af6b8b91a61192ab6148f5b93816053382b671b43c867' 
  AND token = 'Mc4y0heGbKR4Deb2VLzBwYCH95++L/J+bb4M9ZkNOuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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