Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '492cde42bb5e38671b99cbf7110c7988e4cc318429f62995d0887867c7ba313d' 
  AND token = 'bHxG3ifqOqjn9PTw3avJPZ+040iT+O9BiBiM5OerQfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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