SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5293f0e169ef32d4b688bc4f3e60c3ea079b8c1e32a4e999678cc88df487744f' 
  AND token = 'cTJRYmsHKqdZZDUtIpPhzCgN+XL6xr0bcTA//VNAIaM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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