Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9850db868b8c15a499fc93e0047013a383630e825bd0998ee93db757b8d3f179' 
  AND token = 'gH3uD+X8M58wW1cgboQ7pj0Q+g6MRzjaQdi6X9iW+eY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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