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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1113ca4e47af8d516003a6ed7109aa05f30d5ae3e847be0530eebcdac7418ba9' 
  AND token = 'sv9/52Ah80Wd5is+x4lFyMGnosHUWH5DlM3U8TBsYqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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