Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aea0b42c2a965a7bf220b01cea6af2bc67b908b720b66565197b02e096a4965' 
  AND token = 'JBOzl6qc8d5qJIXGKPo2rVt7zXsUljEQrt0QAgqv+VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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