Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd80430d800e8233f596678ac659d09b4f569685d1efe15e2530fb4a0159bb79f' 
  AND token = 'MTCQpBFJi+GgDE1MLOueVR55+BNAitvezeFTF+/V8WY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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