Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84a6840b724645107d9e2eb27100e96fd62d0071b05e7f06b7d417add6b72f27' 
  AND token = '9didQ94tWvfumnMPFjJLL5sxiXhGG7AFw3jpjygpZP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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