Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b810a1fc3b6c3b8861772890139edd1295b9d2682a0b52730368cda208b77192' 
  AND token = 'kqCedxwl1J+YGN+mcYwm7CpzhharGwY7FShtcgZyhZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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