Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77b1dd5cc539f348cee805b70fcaa4d903c4d957d0100cc2b8c696478992f142' 
  AND token = 'XIbvgw4omL3J9F1eHUN8hdJnxdZISKZ8/hcYR82Ug+M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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