Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f50fe7050d13b4590fed04b60c99e1eac561f1fead7cc86070ec0110baac28b' 
  AND token = 'RhuW6msI5SgePdbGgKY1qQD9TFHx4qnv08CeqNZoaOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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