Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eeb3b75cdc05dfdf578c2b10f9624b42d135479eb25adfc782dc5052cdffd6f' 
  AND token = 'e97jQt89RxBVIeev263vXAxDr9Hev0o8DKnWjUzw5Rw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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