Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41ea187eb7805247c6d659a70d0c72ec230852646c3ca5521d07ad4558bbc21c' 
  AND token = 'A+c6y7yp7VJ0kYfeO69wR2CyYqQMQ306menvHw2KGrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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