Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '902302b1bbc5c9ea0cef29c8bf2bf0d98fc1d0550bbb6a06d87100a1516bfa13' 
  AND token = 'Ia05ci6hrQHTWMpBQ3LCpOcb6cS1nH5+IZbJHpLS9KU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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