Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '061da4c627b2c4ad66a865ba66a5bcc40d46449ad951d4a894913f2512259f52' 
  AND token = '8XVOY2ijfAg0ktYGgnyHiawKcwiAd9AHlZIRn96jlQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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