Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a90132c1974efe0c4d74624d4c5f3cb060d952a5b7c5e74d44867e6211dec6a4' 
  AND token = 'MtbZvAMeIjLQqTvOHoMHRgy/iGOpL+HYOJf7agcFdSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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