Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f09d76396f860837ac66f53c0acbb9ba60f49f2253563e0a019288207303ea6' 
  AND token = 'z/yfLSE4r4XFI7ZCt1veJYt0L8tPmyuP4PHzAxA4F+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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