Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92bd361fad070f9eead97e943d0a7c0e3db13fa0c17cccebde4f2ee543470517' 
  AND token = 'sIeKJ5fnNYnWIucUA4rUDH/lQQX0UA0v9g/N1AhYBDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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