Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64600312e4cfeab125d3cc7e161a106d3f58407a143b1957e24a27822f878a54' 
  AND token = 'PGTQiKJCICTEs0g/UltxckZm8zfZk1hkKGdat0FLMcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}