Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '141797ac5705ec36f6e1fd506a956ec2cb34560662765485d7c66f7935c4f572' 
  AND token = '616u0fHjz2QffnsvjOLOFPc6qpbPekDJHkuGZBVBdXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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