Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '888385f46bd13fa84dcca431c5c3c569bf16d46ebd43c5c0f8e122a511cfd319' 
  AND token = 'U7sIXgeS2xfHCA1eP5EFhR4TI42vRT/yM1u1tpngf4k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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