Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a1a71c0effcebf2f6f04ed0fc96937d49bfed6529ef7f98f55de5e1b6cc9250' 
  AND token = '1qM65LSD/6NmAPw5nIDJXmaDKo9VbufcuLXxUrKYU18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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