Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '714fa77f875f3e800b5e143c6405fab7679af55e8ea22efa88d12ecceda8bfcb' 
  AND token = 'kAeN7t9B1M7Hb3XPTo1heoXk+2aYmVCi4GUu929MWNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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