Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b3f7c3b0c1c57e5774d93c701d58b240113058fb7150b3e4551f8fd414e7bc' 
  AND token = '4fKcwhAwbmbRb7ol31jaHerzWuwPrPjkBFAsKtdeuIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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