Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fd7eb26cb4fb4ca56d9357cc20e038762ce29f401f7ee135ddf01de435373d4' 
  AND token = 'eKARKwT9+7y1SFFlSy756VIk21OP8tLPD/yXY1BKfIU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}