Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '885fe632a55a26817bbd31a4c2e2928b911569c0b8333e8e33d298629713a428' 
  AND token = 'IhwkSImiN1FcnLOt0CdHZ8HEo6CMiIo3tdXNISKw3cA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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