Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02e0a127a2c775f566c4597e00e2b103a3cfb5da826783e8da97d7a83f93704c' 
  AND token = '1GRpbmbe3VNmSnsM4BlyXqCGOpGRm6QCHr18Xl9XUS0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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