Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de663a5a3126a924a5ba2f0a2820c92aacedd162e895a6dcabc48a3308f63a00' 
  AND token = 'HwuWY2u4oZUALaewKwHV+fEPfbqFh3aWR0VQ7mcyMP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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