Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4b26ab07a6028d4da76b19740356cee658f72717fb71d9320d66cf765087249' 
  AND token = 'vC0CyLM5+KreO+7kykiA2ufvUmLBLJk7aMpouKo9FGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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