Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c14806f6fc010400bdb33bd2e0903583949ac8949d290edc702d920cd4f3b06' 
  AND token = 'grodfWiB75tKtdrV0zddANNHrmz6S7yTWCJ9QTeXX/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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