Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c35af1371feaf06574f1f2f84a28d60c1616d5d246efd91f0a6120b621280c2' 
  AND token = 'PPY4b14Iq99p7ryT11aHK56QmO6QdjkxXQM3awVWbKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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