Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab332538fcee68e638b1c439faa5cfee1790044eda05d48dea26bc2da06d3ea' 
  AND token = 'CyzvsbEJGianlV75HaLMkxMCarMfscSTsRHmjRiDQfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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