Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '683fa65650890903692b46b9f55256a738254c46a6baa18417c2c204e5d93f7d' 
  AND token = '1OZqFkKMHTkxn1PQxm2MqMtn2aYohxVH2JrRcmx1p+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}