Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3964d2762947e136d083d24d6591e697c91f478abe42fdfa1ca81e0d6f16fedc' 
  AND token = 'AjLGpFb08UwDxSITmgPU2hyixRKoCsaezFi9l6V0ZfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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