Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc8e37e277014c4661ee9d8fb10c01b9269e2296af6bb1e975a74a0f896e48b2' 
  AND token = 'lQzxe9opZE7c4lSFy5ulCcqP6KU4dL5LuQVbZ/NdOic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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