Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cd71119d2c00feb4ee87c6c1cfb4093ac885f454f2181a96cd01fe2c6ee9283' 
  AND token = 'b76LKEVhy8ioJ65ZIgRf3GSsrJHf05HFl3fHEAJmo5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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