Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1405da3c5bb645e3e01ce9cb0c98e6b4b2225241c6d14d734c6919fc8c55940f' 
  AND token = 'f+iHnfDTN8pyFoygzIYATMGgnJc5OW0JiMayzyMuFrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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