Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e73e87087b55345be98157fc7b23722b5b30755badc6fc474bf014f10795ed33' 
  AND token = 'Y4Ex3GlWM6wpsD1kzeQ3At2rrLtjdB2vIbOndKcQSKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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