Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9611307eedc05cc3177e2d59ea420f01adedbaffdb544d3636cbfa51ddb16d79' 
  AND token = 'y+jzSe87+NKaV6KohflM1wFbgU1CYv3jf5u/xsEYTis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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