Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8efa8710d924735bb3efb11ad6b0cab36ca179822c1fc211051bd616913b15b' 
  AND token = 'NogbY2tKCm/ZoVLK8c5sX/x5bA/hXO45JNTiJPOTgiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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