Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98ee1cfeda2c7b423246a31b141ba7091c96cc0a90f13c0ee632f7c31565baff' 
  AND token = '2S5hiudBnIjGO+XYtWV4a28b9Lss1rXvn16bXPTJsRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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