Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0854b07314629afdc2ad276706d1d47188afb33766a5fa5ffd2b5c8696155d3a' 
  AND token = 'VpLnvk0Jo0+4/TrUEap2b399isMA123qT9r57Ljtptc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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