Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67351d09d7b7c8a8a2c5808be9ad1451d03919af6d02972214ef61c93ee9fa34' 
  AND token = 'LZCRsuReaCpQdj9RubiiCJF5ng97tQfJGSUraznrlNE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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