Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ae0a41adacccc62857caa320f1964fb2d2c4ac029824bc52eebe33690a435ea' 
  AND token = '7YjxDp8QKuZ9cLGVxbeSyXPvoYXfCD8E8KLhc9EBLr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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