Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63718de2f144ddf9ccac61477fa002d443357adb90407fa522698a0d48d517db' 
  AND token = '55l0/vZ6w25i/mZ5C932TMBUHq0hrckeSV6R6dTSRm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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