Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec90292fb7845c7097f9da6d54f21c9ecb6434830d26b262700c4f833326fd2c' 
  AND token = 'LeTcfKQVqyuV9VyBr8buhCzvFj5paDV2HZa2G7yyCSw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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