Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '909b87a066f1697919f2671f78912c7aef05b5b2e3a427d3d76fbdb6aa7fd2ba' 
  AND token = 'cer1TOlE056KX3kINYydDcVKJ1foFZbAuk80Zj50Ew8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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