Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd733c93ced4eba16023c35cc24713e581ca3d8b6cc9284ea45e3425f84eae9ca' 
  AND token = 'fybG+9i5Ydtjs0Q8YaayptVc0a5UsECCQlh+Lq8WCK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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