Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a64ffe085cd7f87c300291929fbb7bf60254038825e6bd499d325e7c8c365416' 
  AND token = '9Pl5PuJqTgjpDYHXyrHXP0EnsTmeWfbXv7cUOqqcQrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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