Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dc4438e8c3ff8e911c5f6cba549cd676b1f55224aa365f8c33045d23b6d1c33' 
  AND token = 'BWFRq/zFg24AzcubDHVdLXmsLiIZc2SAzHo4cc/oN8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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