Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4743cf896304cc57d5cb1a874684461314f67aa650ac40ad3e594740e4537fe' 
  AND token = '6epYnQ322Gd9ulT+u/oPLNRew0igHYdpFvgiM5nUYGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}