Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f8c1de1f5f35c78b35d336732a2318b8f20d5de45f194f278df1c26b8da8088c' 
  AND token = 'KbYH9yfaSBBAyy3bGIolFlTCy8h2sApnlo0ixVTaShU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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