Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51cca1374c24d689d8b14300b258ca8ca234a4ce4b83343fcaa5ff1f0e3172f6' 
  AND token = 'dAfr861LHuQgZvBbtjD5YjC26Jo9T58gGHONvrZTODw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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