Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '550f2fb5862cc8b48c8c3d18093fe85343c9d6295881c0c9f9d10d8028f7d768' 
  AND token = '/ZBLUkFsv0LdBzM8JsGuBjLafobYP1/CHOmdN31c/kw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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