Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c6e118d3fe83b553ad7961059a4b72b265d24b1af725203c2ebf2989971e295' 
  AND token = 'plhwylWQS3xzNcw2halQNUWgBvoyO0OgyoMaZLTE11U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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