Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f4a9ca60fbf33ac359208a9a88b378de84959dedd82cd1daf82af6a07aa30fd' 
  AND token = '0rT9axwCyfkYYubavGnBrg1lC6/ilqXH2LJWDxnkiiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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