Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abc950a66b0fef74be6199f7c71fcc2cd058c0fd9ff52edfd08c51b0fe526e27' 
  AND token = 'U9cdMd+JCQh1G5XLrc+vF6KzPbxXiv3vXVYpifo5Pdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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