Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa629f27a923edb38764952d4ba0f52876af9802f6e53f7ed074f489947305a0' 
  AND token = 'HXEXkEFJhSQTwZvUHKBccCftiypY9uLj2r08VQNHtlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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