Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6277011ec1f3cd87b3a9ee30dcb510e0081d9e6ff46bd71c9fbe94e671202afb' 
  AND token = 'bGzddWmnxXMf8dAIL5oGK9YHxFRrbU8deI/vlzs9XeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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