Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ded4298f9134747ec742638762b09ca84a2ee17903ebb0f996ca7ede63fa520' 
  AND token = '2QXfn3Mnd8Vjc0NBtq+eMrdH8DnhCe8C7iZC21sszf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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