Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98d62a043eae2af8313d681d692410a33c2f380d41eac1d4ea724671ba4d9f16' 
  AND token = 'hVhQ6LR3c+SAejQqkH8iU0rYZx6YucUaiL4vjpL1c1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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