Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d9195e8e968a96739947d1888020867773be3a23183e40bac5920e494883b32' 
  AND token = 'OA2JCI0oZzIyxx9I5+m/QkxGwFHwLN8NdrblQmd/WDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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