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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '001517ca23f7fca681e9c2e5c636bb4946719e2820aa0ac752607cdc97cf5637' 
  AND token = 'hJ1XW2iLwSUMR4WnsTDfydWYUPJ5Z4G07sRjrJgu5a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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