Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab6d115854bad5ba4483756c071d73c8f6fd3bf835a861f34b164320264b150a' 
  AND token = 'fmOWgNHdVJ0lR68eoY0QttYTBNLsrynVP/n6jPShoxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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