Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df46769da81123d9f4553f3bfe39132b78917a511f8de29072d1f43aa9d3889a' 
  AND token = '8bVx0+A5hU6bB2wx2O9a+sf8OFac+xBdaBiE55fIA2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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