Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b58f4feecab165a64f287b97445f193a7c880d46afe53b096006e8d8b2ef32a4' 
  AND token = 'NnXV/CHQjqE5+8eurujeLqFhLaaY1f0TfZEvhqyfdAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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