Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1fef90f2e276b5a1c394092a6caac19e8df97f306e87a94413ab9fc6db86007' 
  AND token = '7bULDRNu3WeAPNI6eYYMAcHvIP5s3uZSnVnbh7oJ0d0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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