Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44e26ccea5311218a38d40002de17d9287a1d7dd9c93fca4764da261c18db6dd' 
  AND token = 'Gzni4b8FnH9Ax089UzZ2I8lDLGXBLVcUgj3QfSv6UNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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