SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f85c385a56dd4cb3c87f6c6726569781febb54b41d654c684f68b5f7b58a5fb' 
  AND token = 'doX23pvaBj2lqmFdMOk8ggdSPJq3B5cp/xpcQ/UlMng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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