Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e7e7e412fb8d84c5a15020abb2d49f72e33f4c0a3f2566a6dcd990cfe646b9' 
  AND token = 'LFiFVnpcceCH4YfvlP9drt/mK9ldYHXeKexDdIF8oSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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