Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1cab6f66a61151ea6d8699507ccc86ebdbd3eff447e32541b23f1709a898fe0' 
  AND token = 'tTvPoe2vcdyLXqvq1i1PZ8CAPP5GwOnrfbJRDZaXt/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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