SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22a356fe002f771745906bc6325617cb7164ebd071f8148fc3d8f813e8926537' 
  AND token = 'Q+traVUhDuEH+wm6xIh3CpGmTgmQJt6wFR+m//Y9n30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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