SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98ac4111289bda578afafc3307a1e28fcdba33d98a0f74891159513d4565a0f5' 
  AND token = 'AbAp3jyDJBi1rWoVd5Pv+ZTGLyhKGtdKEZy/MG5HJHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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