Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bcddebc8138dfe0d38d3513e351b293d8fc7d6810ad31790a170eff56b6ce5f' 
  AND token = 'FUhlybF7haiUihKHJoYbOFeXjCIwmrQdtb7p5ZQXNZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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