Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e86e85fae6e56c62a69acffc0655de1ddf745725d1dac4ad1a368408ef69c42a' 
  AND token = 'zoMIkvGOnEuAF1kE8829lCpGdEmrdvQ0cU6lU/XJBQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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