Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6f77bb76034161797d5c5837aae66992d35a55f348b3ade1132e276af97e264' 
  AND token = 'FMtKH0DnRYkd2ArptkMwecNYWh/JmLUlT3a7rV9SXtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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