Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72e1b53e9722a66c14672f1c6a9ead575d884198f5fd3683ce6329ba8f4771b1' 
  AND token = 'yYMQPTpp7d8pozHNU2XNFNWrwUJbhYa53Hoq1MqjQ4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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