Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cdce082fabfbec9bb50361cecbecce4d3ab0360e9e72c4c5c57512aeb05d802' 
  AND token = 'b2e2q6LTNk/KyauQyDIeSUMZ0oFB6l5te4eOSv50IOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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