Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b36f10a1f6579a1cb975ae18c9d452484b48064cefeff5a5f7a1ea47e3ec153' 
  AND token = 'gYHuBreqWXB9cA8o+rTSd7z5P7dILCTkdjOzpeUNtns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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