SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2060d4e104bb2725cd65a93645cb9608437032086fa5a91f2423888ed8e8f0c7' 
  AND token = 'svg+Shz9GDBd2x0V7zRBIBGsvGKPB/Xp3XKrvKls2rU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}