Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c4febe4c453fba1c876d899f26ae599101d71993f80fe6973075c14919a4bfd' 
  AND token = '6MdLuA9scwHfUyUry38C/GKf6YXG50igfogUbJBu8vA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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