Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f6f2c132dd26a9ee83183c1f4313e9cf7abc1a931aa04ebaebaecd9140f8df9' 
  AND token = 'E6DdmhjrFJHh9I42wk0Z5JyRS9d6dU5cHPFpzqjLGWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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