Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b72cd562d60452427961427c524b494a5c82f15a5ee454e2c7db8fd849802d8' 
  AND token = 'LY0rCxMHjTTICxbzDuCydXhdIub4Tu+izTW8rjXR+gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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