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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35ae55e7bca16884bc71d4cb1446edbc775a3710a3fc364a4bdbf1c7f6d66882' 
  AND token = 'y2v35fPeErqWUnhiJhbDiv6ODPGmfdOojxTaecMWPjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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