Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39f216e32e747b3f96a8a55fb2e5499e7862cacce7251228b13246803e98828b' 
  AND token = 'pPCuqYJlQvM12Xo5Gydtu0gOVBN4UT34bI7fHy4obvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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