Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83c73bbc8c44d5db8ee81c6c40459f1b7f4e2d66895a74f8fad005745fb6d62c' 
  AND token = 'C0Yyh1c3W/Xi37kY6FjpYbDDNNhYHf+ktA3qbwJVbrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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