Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f263fb25c2d7c934a40bc0df3eefa824cd1d53665ab0e92d7d07a9cd0cdb840' 
  AND token = 'kzotOyPskB0iR2Brv9vodPp3zx0ljUloSmwuA8WSVFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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