Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e97eaa0f8032b219d3fa0501bc5f680b62b676f04cd3f5a3bb5c8c775bc1600' 
  AND token = 'mvbYWESmtltRgJfsl057PD89uAD4naepIpp2iWpUrTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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