Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59b63ecb46df80e228c8c01a603e23aa66a63820e071266ee9bc59ed9faafbc1' 
  AND token = 'e8EvlBIJhjRPy0MLQDrBzdyzHYjPuqX3qxVHmlauhvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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