Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d2907e26131fb1f2a850b11c5cb2669c65b7aea9e530043672e5bb0492be8b5' 
  AND token = '4mUKbPnMCIFw5d5ZCVphCeYx6k66iaCwWlGQ9vE8yns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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