Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8e80fbb825e977cbc0ba91ea661e0254df0fd2c7458cf394c40b48108f1c88d' 
  AND token = 'PE/pXGtLlYA/dZ8pEgNKS4Q1HaBdyRlPiOhGWCcftT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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