Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a172f489d64ff06014e9556f33a135a46226821247297cd0983aa75bc974667' 
  AND token = 'TtSqlOogc6bbXZb0jmIte69cnWtd9GZ4Y2S3/TJBxDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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