Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12837686c72a8554ce3e22540d17f0a372f10f44040b760c601c7ebe997b317d' 
  AND token = 'SoQSI1khqYfI0W6znnAF9Fc6wEP3RmLcK8W4UA3Inrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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