Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55537aca44124851098491d32fa098a03031e88a7770bb66f2f5b69a67133ecf' 
  AND token = 'ZRaThl88Bl0+YnEGW6Tg5LSEUVMrMuIkXfiCEf3TaYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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