Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '204f0099cda1dcf48301b68d9f7baa863db366e162f17c39b19bb4d8da37898c' 
  AND token = 'At5ZKeghSlF51QBGYxJw6xXaTmicvAfHafbHHhynJ8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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