SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'effd342b217c334e5a2de97001edf8ae778249dca19f834294925bf731f14542' 
  AND token = 'oGgo/j8bk/Lh9Mv60YAZNi+RYJtU/DWHQUSCv1YwNS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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