Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdce34af22acf6885744939c175cda3d505f3ec71d5835dfc1ee32f17602e46e' 
  AND token = 'IrVsLrAcPJZsP0vVhBVAdE9jlAdXO+YDyDmSYZnv56E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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