Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5226181f4f26387202ad8f9c5f51a70c7c836287c6b1b66dc68eec983ec0a046' 
  AND token = '8XSV4gMmFyiH1f9z5RLPViCSSv043kjoI9ikfeI9ysk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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