Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8283874dd7805ca934de993af2ff71e3a56ee33024b5b880398b233d0cf0250' 
  AND token = '/e30HjASarYXHttNeYOpPIXNQWuWvOwr733YTir2gds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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