Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae452658dbc67aab5aef442a3d80188d44784587ba208b3ae544fceab796748b' 
  AND token = 'rVm1va1gJ0RCLyqAIbOb3zHdqcw+7u0hKyKEBbNVt9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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