Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf214993eb97974849a4bb886c4ee8ddbf9e904773dcbd01ead4ad54971bb17' 
  AND token = 'sN824qBBe/NJdXt6K+JaNxs8R+DpTmrV5h1Sedp2XkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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