Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdb9bced164ba78a234e23cb4009d411418bcbb65514364b880e69f32565c442' 
  AND token = 'rzUXxLG9K4VS7bWIYd6sKdIejIXPHY9ae//HuOkPkSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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