Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0383c72992cefa52d72de38162aed7a8c518356572fb4ee447adb2a3b53dae4d' 
  AND token = '6Nc3ocnX4toaHk7vUZnF/grBkw/eXWs4c1GpByiCDkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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