SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '610fa95ff2a9278aecf4df67b36739887e3402e321e720d7e09dac58eabf03df' 
  AND token = '10Q5zKKgRZdwFRPM4MLzKmeHZ8+VoKmMQfXj7BuOvbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}