Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c67c56c59dcaef4bc531ca9930483cc0fe7b1de064cab8a8723ffe7f7989ece' 
  AND token = 'K3OOsbm6E2ZWeHC0+HZLgnmbCNfJMJNlki69Pf7JiAM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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