Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3fa703d7df46b4d2a6043e5720afb3bfb24cfed00108988498ad40fe2e7672d' 
  AND token = 'Vhf/AFaoA+O7LXuLqadMIxgyuLC5ulGYHvr0EmExgFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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