Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b182f1b96905fdf6a3e36b2aca1308c1ad9b08a0bc607b9c14f5b3f64498daa' 
  AND token = 'zVZKD/xVJFcdfYONqpE50SsbqXx4VD6qhJxYg0EdoDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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