Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f6c269d788cdb1a52436b36849775307e261cb26b76e566f2e2d6ce57efeae7' 
  AND token = 'zr9haf4ATRn6x5j9c+oJJwCjKM8kX4lsee+20yL6gRo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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