Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fbb133c2db81f45780adde0af432b86ea27e6f6e0dbf1768c28b35bc6524868' 
  AND token = 'Xh4affd2ppFjfQJYcHURfQbzwTsNVMivJxiXmNjnNhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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