Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8331ecff7d6bf9bbd45399addd4c039e4ffdcc3bbcc439d3ae65c82f2ea6867f' 
  AND token = '7ABgpBvt7InF7b5nORdLeW7T1v63DjR1THVCiRdrte4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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