Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7093b7a015b9247c8c7ec3228f75c0484d3f58a91d6ad567ca9e802477024aea' 
  AND token = 'gYK8UdbZHmSpiOffWgiMKD+1JK8IuLpzZbS67W2UpyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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