Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34922fe832b9348108df5c1c8eb0937fba17e529d1bd90a2c147364c9cc1b3dc' 
  AND token = '6CSjRWL3i9PP/IfnQaZuv4wPPJlNMdv9rpdQPR4u6VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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