Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '575c53cf0f1fd61c94bde9b959bdbbc6798ebae0efebed6483477e7cf3f86618' 
  AND token = '0ZG20NlZcawPLETuypF9IaOcc0shKcO4FytyphTpMEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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