Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed7ceb8a9971a3332510b36b21d6849f7a4e103b4aaaf72b439546de82014af' 
  AND token = 'Hs/m/JGo74O5pwjBPlM6aQtf6uN8Jdv/sXYj5kX9c7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}