Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c867cde97404fed1d1248e83d412258b739bc7b72f7207fb443b40fdeec8f8b' 
  AND token = 'aFhriLY3T8fEcYumxA33PaKfzKVclIeaWFO/K7vi6OA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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