Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc13d88ffec7c1976eedae805011c3a47a32c6ea0f4b353a7bcc7230f3d5cb15' 
  AND token = 'xyuOZF/X0cVdq3+qxZCP6zAkz2yj1xJnWf6P8kCVG84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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