Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '401ce495d1f3e00cf95c299ff3dfd476c7c9d504dec9c7bce4c6e5f8d4fdd2b4' 
  AND token = 'AMfB9rSKGmUqH+AuxNqLO0rC7kLFXUZiu9RW5xHCmlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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