Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b9cabe69b299976066321e8afdcd432b183ea08d5768eb04af3e55ac13b56dc' 
  AND token = 'naFsBdVJTdfg4CvWcy4G0ff2W4iJKViyLXKpzK/vD3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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