Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c31e57c5419ec81f3a06dcfd4a37b445822fbccc61614c736a85358333c2c22f' 
  AND token = 'taXK/uLXZiyUd4Q8W17d4aKLsAHONe7/m81BvIsIpWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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