Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c1093802052e0d388eb2e737a10a686e8772c398a63562cda648884f5e7799a' 
  AND token = 'wB3wIm0pKkUSTtozEvocRGZEUCrM9OI/iTxZ8K5aU/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}