Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd2e86889d19ed8ae0f976c114ea91939fffe1fd9652ff84a7998950cacefd4c' 
  AND token = 'MHop3puYsIi9PnSot1a2t+tt/QCbQIX4soM3lTu053I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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