Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93ddb8f3a7b4a812a9c6e3d6228e46d5085a9483774575a29bf813856a6e366a' 
  AND token = 'oWcjUv7/2p6B0IevblQzU0DIoQhL5+lR04k+/cWCw00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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