Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '440a8deecc4efe45f9ee59d131670a0df6a6bf11ab0097833d40bd123587f8d2' 
  AND token = 'GaA+d1iXacbsLl9nM8WSgl3ggyvOC252g1NPEtleHcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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