Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8a434cb5782317c571536c7d50544d285b037766b7b19565ea3e7da4a2276a4' 
  AND token = 'AgFi+D8UTZWP/9mVxAR2EtERSVz8F4AA2OC0BmcW1PI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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