Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46c61f7543c594756d9f040aee5afb075d8a8dbba9903c986bb3f150be8387ad' 
  AND token = 'AVbHw5Pie7OmnP2pfdyvwlU3EpbMkcis1UGiwzVizmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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