Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ddf4aff01d7daf08978f4902f8911a4c24f4a6b5fc8b33bfa704faa361c107f' 
  AND token = 'gX8Rvn+03NLYsazfy0q8ahRSDxjAF42CPgmqUsQ4c9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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