Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b563f32a622660f34df6020240dfe236682ae9ee3dece60eab8563e08e8d4568' 
  AND token = 'iP5ejWFsE/js9qLnpnMdKEcT0iBXEWWSWn9LzbWt8/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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