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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9676497b5a332a93560e295412c95ca6cbeb7c59ade814b041913815ae561105' 
  AND token = 'miXZ0OXfxaDJ/Q2ZmthrHP3HGLvf8+y8D+DPrJ6wLOI=' 
  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"
    }
  }
}