Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ec59e786c661c7c111c8f5bdc1adbfa7904695217fde545b9beffa12db67419' 
  AND token = 'W6ff8reENjKwB3anfhW04SjLnfpA3RLYAPD3Y9cAsE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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