Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da911e4f81607b5ff995bd49d3acd312ec5ab21d73af8b2024d5ebb81fb1a786' 
  AND token = '6THvkt998Knqvbd0/31kppztUFwBy0A5LY+NpDkGSiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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