Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2152e9f360e280310230e20698e33781c5c6cc26ebc65625ebb0c778ea3ac1f6' 
  AND token = 'vhofaRo4oMyjdShRZieDGZKokXu1WMS3kYuLawezQCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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