Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48a9ca44e5346284af5464166645970e35536900adcc44c58548ffafa9d10cb4' 
  AND token = 'HH1IylGn6lHVMd5tgHBHewJ758R2lj+t8V64CHIZwvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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