Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a622351d12b49b25a3448a3724b614f1a93a014eee21bf40802d2a7d9eb06afe' 
  AND token = 'nfQMvowtlrG+HMjrDyntRvQ4nkvCFqp6lThJ2h5Xjo4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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